the free volume of thematrix caused by the addition of the plasticizer,
as reported by other authors [14,29]. An increase in the rate to reach
the steady state of OTR valueswas also observed with the increase in
plasticizer concentration. With the purpose of comparing with other
polymer films, OTR tests were also carried out with low density
polyethylene (LDPE) and polyethylene terephthalate (PET) under the
same conditions. PLAeOLA films resulted in lower OTR*e values than
those obtained for LDPE (160 cm3 mm m2 day1), but higher than
those for PET (3cm3mmm2 day1). As thosematerials are currently
used in films for food packaging, PLAeOLA films could be acceptable
for such applications even at the highest plasticizer percentage. In
addition, results are comparable with those obtained for PLA plasticized
with polyadipates at 20 wt% under the same conditions,
showing better oxygen barrier properties than PLA plasticized with
DOA [14].
the free volume of thematrix caused by the addition of the plasticizer,as reported by other authors [14,29]. An increase in the rate to reachthe steady state of OTR valueswas also observed with the increase inplasticizer concentration. With the purpose of comparing with otherpolymer films, OTR tests were also carried out with low densitypolyethylene (LDPE) and polyethylene terephthalate (PET) under thesame conditions. PLAeOLA films resulted in lower OTR*e values thanthose obtained for LDPE (160 cm3 mm m2 day1), but higher thanthose for PET (3cm3mmm2 day1). As thosematerials are currentlyused in films for food packaging, PLAeOLA films could be acceptablefor such applications even at the highest plasticizer percentage. Inaddition, results are comparable with those obtained for PLA plasticizedwith polyadipates at 20 wt% under the same conditions,showing better oxygen barrier properties than PLA plasticized withDOA [14].
การแปล กรุณารอสักครู่..
